CN109843118B

CN109843118B - Furniture drive

Info

Publication number: CN109843118B
Application number: CN201780063746.9A
Authority: CN
Inventors: F·杜巴赫; A·S·弗洛高斯
Original assignee: Julius Blum GmbH
Current assignee: Julius Blum GmbH
Priority date: 2016-10-17
Filing date: 2017-07-13
Publication date: 2021-06-15
Anticipated expiration: 2037-07-13
Also published as: JP6743298B2; AT518545B1; JP2019534760A; EP3525622A1; WO2018071930A1; AT518545A4; CN109843118A; EP3525622B1; ES2811356T3

Abstract

The invention relates to a furniture drive (4) for a furniture part (2) mounted so as to be movable relative to a furniture body (3), comprising: at least one pivotably mounted actuating arm (5) for moving the movable furniture part (2); a compensating device (6) which exerts a compensating force on the at least one adjusting arm (5) counter to the weight force of the possibly loaded furniture part (2), wherein the compensating device (6) has a spring device (7) for force-loading the at least one adjusting arm (5); a transmission mechanism (19) for transmitting the force of the spring device (7) to the at least one adjusting arm (5), wherein the transmission mechanism (19) has at least one movably mounted adjusting element (21), an adjusting contour (8) and a pressure piece (9) acted on by the spring device (7), wherein the pressure piece (9) can be moved along the adjusting contour (8) when the at least one adjusting arm (5) is moved, wherein the compensating device (6) has a handle (10) which is fixed to the movable furniture part (2) and can be actuated by a person, wherein the at least one adjusting element (21) can be moved relative to the pressure piece (9) by actuating the handle (10), whereby the force exerted by the spring device (7) on the at least one adjusting arm (5) can be varied, so that the compensation force is increased when the weight of the movable furniture part (2) increases and is reduced when the weight of the movable furniture part (2) decreases.

Description

Furniture drive

Technical Field

The invention relates to a furniture drive for a furniture part mounted movably relative to a furniture body, comprising:

at least one pivotably mounted actuating arm for moving the movable furniture part,

a compensating device which exerts a compensating force on the at least one adjusting arm counter to the weight force of a possibly loaded furniture part, wherein the compensating device has a spring device for force-loading the at least one adjusting arm,

a transmission mechanism for transmitting the force of the spring device to the at least one actuating arm, wherein the transmission mechanism has at least one movably mounted actuating element, an actuating contour and a pressure element loaded by the spring device, which pressure element can be displaced along the actuating contour when the at least one actuating arm is moved.

The invention further relates to a piece of furniture having a furniture drive of the type to be described.

Background

A particular challenge when using such furniture drives is to adapt the torque of the spring device applied to the actuating arm to the respective weight and/or the different loading conditions of the movable furniture part. If the torque is too low in relation to the weight of the furniture part and/or the loading state, the movable furniture part cannot be moved into the raised end position relative to the furniture carcass at all. If the torque adjustment applied to the adjustment arm is set too high, it is quite possible for the movable furniture part to spring into an end orientation raised relative to the furniture carcass with an unfavorably high force.

WO 2010/006346 a2 discloses a furniture drive for a furniture part which can be lowered relative to a furniture carcass, wherein the furniture drive has a first electric motor for driving the furniture part, a measuring device for detecting the weight of the furniture part, and a compensating device having a spring, which can be prestressed to different extents by a second electric motor as a function of the measured weight of the movable furniture part. However, the production of such furniture drives with electrical components is also associated with high costs.

US 2011/0266937 a1 shows a self-adjusting force drive for moving a movable furniture part, wherein an adjusting arm is pivoted to different extents in dependence on the weight of the movable furniture part and thereby prestresses an energy store to different extents in order to compensate for the weight of the movable furniture part. After a successful adjustment of the adjusting arm, its preset orientation can be fixed by means of a locking pin, wherein the locking pin is actuated by means of the pull wire and a handle arranged on the pull wire.

EP 1820420 a1 shows a piece of furniture with a lowerable furniture part, wherein a compensation device with a gas spring is provided to compensate for the weight of the movable furniture part. The gas spring is connected in an articulated manner to a movable slide, wherein the slide can be adjusted along a guide relative to a pivot bearing of the adjusting arm by actuating a lever having a handle arranged thereon. In this way, different lever ratios are produced, so that the force of the gas spring exerted on the adjusting arm is adjustable. It is disadvantageous here that the accessibility of the handle is hindered by the presence of the furniture part.

Disclosure of Invention

The object of the present invention is to provide a furniture drive of the type mentioned at the outset in order to avoid the abovementioned disadvantages, wherein an adaptive adaptation of the compensation force to different weights and/or different loading states of the movable furniture part can be achieved.

It is therefore proposed according to the invention that the compensating device has a handle which is to be fastened to the movable furniture part and which is to be actuated by a person, wherein by actuating the handle the at least one adjusting element can be moved relative to the pressure piece, whereby the force exerted by the spring device on the at least one adjusting arm is variable, such that the compensating force is increased when the weight of the movable furniture part increases and is reduced when the weight of the movable furniture part decreases.

In other words, a handle is provided which can be arranged on the movable furniture part and which, in the mounted state, is mounted in a manner such that it can be pivoted or moved in a limited manner relative to the movable furniture part. The handle is in operative connection with at least one adjusting element of the transmission mechanism, so that the adjusting element is also moved together in at least one direction of movement when the handle is actuated, and the compensating force of the spring device, which is applied to the at least one adjusting arm, is variable. The compensation force opposing the weight force of the movable furniture part can thus be set by manually actuating the handle in such a way that it corresponds to the weight force of the movable furniture part, i.e. the movable furniture part is kept balanced in the open position by the compensation force provided by the spring device and is thus easy to handle for a person.

The adjusting element can be formed in one piece, but also in two or more pieces.

The proposed furniture drive is particularly suitable for furniture parts which have a storage space for accommodating a storage and which are mounted so as to be movable relative to a furniture body between a raised closed position and a lowered open position. The weight of the movable furniture part is also subject to dynamic changes by loading the storage or by removing the storage, wherein this different weight can be compensated for by manually actuating the handle.

However, it is not absolutely necessary that the furniture part has a storage space for accommodating the stored goods, but the furniture drive can also be used for a movable furniture part in the form of a furniture flap, which is mounted in a manner such that it can be moved in an elevated manner relative to the furniture carcass. Adjusting the compensation force by actuating the handle is also of interest in such furniture flaps, for example when a furniture flap made of a wood material or a lightweight structural panel is replaced at a later point in time by a furniture flap made of a heavier material (for example glass). The same furniture drive can therefore also be used for furniture flaps of different weight, different size and/or different material. It can also happen that the mechanical devices of furniture drive devices have been difficult to operate for years due to increased friction. This problem can also be eliminated by the furniture drive, since the compensation force is reset by actuating the handle with each movement of the furniture part.

The adjustment of the compensation force can be carried out, for example, in that: in a first step, the movable furniture part is moved into a lowered position relative to the furniture carcass, and in a subsequent step, the handle is actuated by the application of a mechanical force, in which the furniture part is not moved, until the final compensation force corresponds to the force of gravity. If the compensating force of the spring device exceeds the weight force of the movable furniture part, the movable furniture part is raised from the lowered position by the force of the spring device, and the balanced furniture part can then be raised further by manual actuation.

The furniture drive can have a locking device for locking the position of the at least one adjusting element, so that the adjusting element can be locked in the preset position by actuating the handle after successful pre-positioning. The adjusting element can be locked by the locking device when the compensation force of the spring device is substantially equal to or greater than the weight force of the movable furniture part.

Drawings

Further details and advantages of the invention emerge from the following description of the figures. Shown here are:

fig. 1 shows a perspective view of a piece of furniture having a furniture part which is mounted in a manner such that it can be moved up and down relative to a furniture body by means of a furniture drive;

fig. 2 shows a side view of the piece of furniture according to fig. 1;

fig. 3 shows a side view of the piece of furniture, in which the compensation force is increased by manipulating the handle;

fig. 4 shows a side view of the piece of furniture, wherein the adjusting element is locked by the locking device after successful pre-positioning;

fig. 5a, 5b show a piece of furniture having a movable furniture part in two different height positions;

fig. 6a, 6b show a side view of a piece of furniture with a lightly loaded furniture part, wherein the adjusting element is unlocked on the one hand and locked after a successful presetting on the other hand;

fig. 7a, 7b show a side view of a piece of furniture having a reloaded furniture part, wherein the adjusting element is unlocked on the one hand and locked after a successful presetting on the other hand;

fig. 8 shows an exploded view of the furniture drive.

Detailed Description

Fig. 1 shows a piece of furniture 1 having a movable furniture part 2, which is mounted movably relative to a furniture carcass 3 by means of a furniture drive 4 between a raised closed position and a lowered open position. The furniture part 2 can have at least one storage space 39 for accommodating a storage 18, which is represented by the illustrated disk stack. The furniture drive 4 comprises at least one pivotable actuating arm 5, which is to be fastened on the one hand to the furniture carcass 3 and on the other hand to the movable furniture part 2. In the exemplary embodiment shown, a second actuating arm 5a for moving the furniture part 2 is also present, which is articulated with a first end region on the furniture carcass 3 and with a second end region on the movable furniture part 2. A compensating force opposing the weight force of the possibly loaded furniture part 2 is applied to the at least one adjusting arm 5 by means of a compensating device 6, wherein the compensating device 6 has a spring device 7 for force-loading the adjusting arm 5. The spring device 7 can comprise one or more helical springs, which are embodied here as compression springs 42 (fig. 8). Alternatively, the spring device 7 can comprise at least one or more tension springs or a pneumatic pressure accumulator.

For the transmission of the force from the spring device 7 to the actuating arm 5, a transmission mechanism 19 is provided, which in the illustrated embodiment has a deflection lever 13 pivotable about an axis 14, a force transmission lever 15 connected in an articulated manner to the deflection lever 13, an intermediate part 16 connected in an articulated manner to the force transmission lever 15, a movably mounted actuating element 21, an actuating contour 8, which can be arranged or formed on the actuating arm 5, for example, along the actuating contour 8 when the actuating arm 5 is moved, and a pressure part 9 acted on by the spring device 7. However, the pressure piece 9 and the adjusting contour 8 can also be arranged in other positions in the drive train acting between the spring device 7 and the adjusting arm 5, for example in such a way that the pressure piece 9 bears on the adjusting arm 5 and/or the adjusting contour 8 is arranged or formed on an intermediate lever acted on by the spring device 7. The pressure element 9 can be designed as a pressure roller which is rotatable about an axis and which can roll along the adjusting contour 8.

The compensating device 6 comprises a handle 10 to be fastened to the movable furniture part 2 and to be actuated by a person, which is mounted so as to be pivotable about an axis 11 extending horizontally, for example, in the installed state. By applying a force to the handle 10 manually, the relative distance between the adjusting element 21 and the pressure piece 9 is variable, whereby the force exerted by the spring device 7 on the adjusting arm 5 is also variable, so that the compensation force of the spring device 7 is increased when the weight of the movable furniture part 2 increases (for example by additionally loading the storage 18) and is correspondingly reduced when the weight of the movable furniture part 2 decreases (for example by removing the storage 18).

Fig. 2 shows a side view of the piece of furniture 1, wherein only a lower part of the furniture carcass 3 is shown and the movable furniture part 2 is in a completely lowered orientation relative to the furniture carcass 3. For moving the furniture part 2, two actuating

arms

5, 5a are provided, which are each fastened on the one hand to the furniture carcass 3 and on the other hand to the movable furniture part 2. The compression spring 42 of the spring device 7 is supported on the stationary spring base 23 and presses against the first lever end of the steering rod 13, which is mounted pivotably about the stationary shaft 14. The second lever end of the steering lever 13 is connected in an articulated manner to a force transmission lever 15, which is connected pivotably to an intermediate piece 16. The intermediate piece 16 is connected to a preferably curved first lever 28a and via a stationary shaft 22 to the stop lever 17. The second lever 28b is coupled in an articulated manner both to the first lever 28a and to the blocking lever 17, wherein the blocking lever 17 is operatively connected to the handle 10 pivotable about the axis 11 via the push rod 12. The pressure element 9 in the form of a rotatable pressure roller is mounted on an adjusting lever 26 which is pivotable about a stationary shaft 24, wherein a movable adjusting element 21 in the form of a lever is mounted pivotably about the stationary shaft 24 and is mounted movably about the shaft 11 by movement of the handle 10, for example via a screw 27, relative to a guide 20 which is arranged or formed on the adjusting lever 26. For locking the actuating element 21, a locking device 31 is provided, which comprises a switching element 33 that can be moved up and down to a limited extent and a locking element 32 that can be moved by the switching element 33. The stop element 32 is pivotably connected to the setting lever 26 via a shaft 30, and the switching element 33 is prestressed downward in the vertical direction by an accumulator 43 (fig. 8) and can be supported on the second actuating arm 5 in the illustrated drawing, as a result of which the stop element 32 is disengaged from the stop lever 17. The locking lever 17 is provided with a toothing 34 which, in the locking position, interacts with a mating toothing 35 of the locking element 32. Alternatively, it is possible for the locking lever 17 (and thus the actuating element 21) to be fixed in a force-fitting manner, i.e. by clamping, after successful pre-positioning. In fig. 2, the compensating force of the spring device 7 is set to a minimum so that the movable furniture part 2 does not bounce upward in an uncontrolled manner as a result of the removal of the storage 18. Furthermore, the adjusting element 21 is in the unlocked position in the lower or lowered end position of the movable furniture part 2, so that the adjusting element 21 can be preset in this end position, preferably steplessly, relative to the pressure piece 9 by applying a mechanical force to the handle 10.

Fig. 3 shows the piece of furniture 1 according to fig. 2, wherein the orientation of the adjusting element 21 relative to the pressure piece 9 can be changed by manually actuating the handle 10 about the axis 11 in the direction of the arrow 37, and thus the compensation force of the spring device 7 can also be preset. By actuating the handle 10 in the direction of the arrow 37, the stop lever 17 is also tilted counterclockwise about the positionally fixed rotational axis 22 via the push rod 12, as a result of which the two

levers

28a, 28b and thus also the bolt 27 of the adjusting element 21 are also moved upward along the guide 20 and can thus be positioned closer to the pressure piece 9. The intermediate piece 16 is also pivoted counterclockwise about the stationary rotational axis 22, as a result of which the spring device 7 is compressed more strongly via the force transmission lever 15 and via the steering rod 13, increasing the compensation force. The blocking element 32 remains disengaged from the blocking lever 17 until the compensating force of the spring device 7 corresponds to the weight force of the movable furniture part 2.

Fig. 4 shows the piece of furniture 1 according to fig. 3, wherein the handle 10 continues to be moved in the direction of the arrow 37, whereby the bolt 27 of the adjusting element 21 also continues to be moved along the guide 20 of the adjusting lever 26 and the distance between the pressure piece 9 and the adjusting element 21 is reduced. By reducing the relative spacing between the pressure element 9 and the adjusting element 21, the spring means 7 is also stressed, so that the compensating force is increased. When the compensating force of the spring device 7 finally exceeds the weight force of the movable furniture part 2, the movable furniture part 2 is slightly raised by the force of the spring device 7 by a height difference Δ H relative to the furniture carcass 3. By means of this lifting movement of the furniture part 2, the switching element 33 is also lifted from the second actuating arm 5a, wherein the switching element 33 is moved vertically downwards in the direction of the depicted arrow 38 by the force of the unloaded accumulator 43. By moving the switching element 33 downwards in the direction of the arrow 38, the stop element 32 is also pivoted about the shaft 30, so that the stop lever 17 (and thus the adjusting element 21) can be locked by the stop element 32. The switching element 33 is thus movably mounted between a first position and a second position (for example via the illustrated elongated hole of the switching element 33), wherein the actuating element 21 can be unlocked from the latching element 32 in the first position of the switching element 33 and the actuating element 21 can be automatically locked by the force of the energy store 43 in the second position of the switching element 33 by means of the latching element 32.

Fig. 5a shows the piece of furniture 1 according to fig. 4, with the furniture part 2 still moving upward relative to the furniture carcass 3. The adjusting element 21 is kept locked in its preset orientation relative to the pressure piece 9 by means of a locking device 31. The pressure element 9, which is designed as a pressure roller, can be displaced along a convexly designed adjusting contour 8 by the movement of the adjusting

arm

5, 5a, which adjusting contour is arranged or designed in the exemplary embodiment shown on the adjusting arm 5 pivotable about a pivot axis 36. Fig. 5b shows the piece of furniture 1, the movable furniture part 2 of which is in a further raised position. The movable furniture part 2 can be moved from fig. 5a until the furniture part 2 is completely accommodated in the furniture carcass 3 in the further raised position. The movable furniture part 2 is mounted pivotably and/or linearly movably relative to the furniture carcass 3 by means of a furniture drive 4.

Fig. 6a shows a piece of furniture 1 in which the movable furniture part 2 is only loaded with a small amount of storage 18, i.e. only a single tray is present on the movable furniture part 2. In the lower end position of the movable furniture part 2, the adjusting element 21 is unlocked from the locking device 31 and the bolt 27 of the adjusting element 21 is in a remote position relative to the pressure piece 9, so that the spring device 7 exerts only a small torque on the adjusting arm 5. By actuating the handle 10 in the direction of the arrow 37, the stop lever 17 is pivoted about the stationary shaft 22, whereby the bolt 27 of the adjusting element 21 also moves along the guide 20 and the spring device 7 is also stressed in accordance with the weight of the lighter store 18. When the compensating force of the spring device 7 exceeds the weight force of the movable furniture part 2, the movable furniture part 2 is raised by the force of the spring device 7. By means of this lifting movement, the switching element 33 is also disengaged from the second actuating arm 5a, whereupon the switching element 33 is pressed vertically downwards by the force of the energy store 43, whereupon the latching element 32 is locked in the preset position of the actuating element 7 by means of the latching lever 17 (fig. 6 b). In the case of a low weight of the movable furniture part 2, the handle 10 is pivoted in the direction of the arrow 37 in an angular range α of, for example, 20 °.

Fig. 6a and 6b show a piece of furniture 1 in which the movable furniture part 2 is heavily loaded by the storage 18, i.e. in this case several disks are present on the movable furniture part 2. In this case, the handle 10 must be moved through an angular range of, for example, 40 ° until the compensation force is set correctly and an automatic locking of the adjusting element 21 is brought about by the locking device 31 (fig. 6 b). As is clear from a direct comparison of fig. 7b with fig. 6b, the distance between the pressure piece 9 (the axis of rotation of the pressure roller) and the bolt 27 of the adjusting element 21 in fig. 7b (i.e., in the case of a high weight of the movable furniture part 2) is smaller than in fig. 6b (in which the weight of the movable furniture part 2 is low). In this embodiment, therefore, the higher the compensating force of the spring device 7 which is applied to the first actuating arm 5, the smaller the relative spacing between the pressure element 9 and the actuating element 21.

Fig. 8 shows an exploded view of the furniture drive 4. The spring means 7 comprise two posts 40 which lead through two compression springs 42 to prevent bending of the compression springs 42. The handle 10, which is pivotable about an axis 11, is connected to a push rod 12, by means of which the stop lever 17 can be moved about a fixed axis of rotation 22. A convex adjusting contour 8 is formed on the first adjusting arm 5, wherein a pressure element 9 in the form of a rotatable pressure roller can roll along the adjusting contour 8. The second actuating arm 5a has a connection 41, by means of which the pivoting movement of the second actuating arm 5a is synchronizable with the pivoting movement of the second actuating arm, which can be arranged on the opposite side of the movable furniture part 2. An energy store 43 can also be seen, by means of which the switching element 33 is prestressed vertically downwards in the installed state.

Claims

1. A furniture drive device (4) for a furniture part (2) movably supported relative to a furniture body (3), comprising:

at least one pivotably mounted adjusting arm (5) for moving the movable furniture part (2),

-a compensating device (6) which exerts a compensating force on the at least one adjusting arm (5) counter to the weight force of the loaded furniture part (2), wherein the compensating device (6) has a spring device (7) for force-loading the at least one adjusting arm (5),

-a transmission mechanism (19) for transmitting the force of the spring device (7) to the at least one adjusting arm (5), wherein the transmission mechanism (19) has at least one movably mounted adjusting element (21), an adjusting contour (8) and a pressure piece (9) loaded by the spring device (7), wherein the pressure piece (9) can be moved along the adjusting contour (8) upon a movement of the at least one adjusting arm (5),

characterized in that the compensating device (6) has a handle (10) which is to be fastened to the movable furniture part (2) and which is actuated by a person, wherein the at least one adjusting element (21) can be moved relative to the pressure piece (9) by actuating the handle (10), whereby the force exerted by the spring device (7) on the at least one adjusting arm (5) is variable in such a way that the compensating force is increased when the weight of the movable furniture part (2) increases and is reduced when the weight of the movable furniture part (2) decreases.

2. Furniture drive apparatus according to claim 1, characterized in that the adjusting element (21) is movable in or along a guide (20) relative to the pressure piece (9) by manipulating the handle (10).

3. Furniture drive apparatus according to claim 2, characterized in that the transmission mechanism (19) has at least one setting lever (26) pivotable about an axis (24), wherein the guide (20) is arranged or formed on the setting lever (26).

4. Furniture drive according to claim 3, characterized in that the pressure element (9) is supported on the setting lever (26).

5. Furniture drive device according to one of claims 1 to 4, characterized in that the furniture drive device (4) has a locking device (31) for locking the orientation of the adjusting element (21).

6. Furniture drive device according to claim 5, characterized in that the at least one adjusting element (21) can be locked by the locking device (31) in an orientation in which the compensating force of the spring device (7) is substantially equal to or greater than the weight force of the movable furniture part (2).

7. Furniture drive according to claim 5, characterized in that the locking device (31) has a switching element (33) which is movably supported between a first position and a second position and a stop element (32) which is movable by the switching element (33) for locking the adjusting element (21), wherein the adjusting element (21) can be unlocked in the first position of the switching element (33) and the adjusting element (21) can be locked automatically by means of the force of an accumulator (43) in the second position of the switching element (33) by means of the stop element (32).

8. The furniture drive as claimed in claim 7, characterized in that the furniture drive (4) has a second adjusting arm (5a) for moving the movable furniture part (2), wherein the switching element (33) can be supported on the second adjusting arm (5a) in the first position and the switching element (33) is disengaged from the second adjusting arm (5a) in the second position.

9. Furniture drive according to claim 7 or 8, characterized in that the locking device (31) has a stop lever (17) which is movable by actuating the handle (10), the stop lever having a toothing (34), wherein the toothing (34) of the stop lever (17) engages with a mating toothing (35) of the stop element (32) in the second position of the switching element (33).

10. Furniture drive device according to claim 9, characterized in that the handle (10) is hingedly connected with the stop lever (17) via at least one push rod (12).

11. Furniture drive arrangement according to claim 9, characterized in that the arresting lever (17) is connected with the spring device (7) via at least one force transmission rod (15).

12. Furniture drive according to one of claims 1 to 4, characterized in that the pressure element (9) is designed as a pressure roller which is mounted rotatably about an axis.

13. Furniture drive device according to one of claims 1 to 4, characterized in that the handle (10) is mounted on the movably mounted furniture part (2) in a manner that it can be moved in a limited manner relative to the movably mounted furniture part (2) in the mounted state.

14. A piece of furniture (1) having at least one furniture drive (4) according to one of claims 1 to 13.

15. Piece of furniture according to claim 14, characterized in that the piece of furniture (1) has a furniture body (3) and at least one furniture part (2) which is mounted movably relative to the furniture body (3), wherein the movable furniture part (2) is mounted movably relative to the furniture body (3) between a raised position and a lowered position by means of the furniture drive device (4).

16. Piece of furniture according to claim 14 or 15, characterized in that the movable furniture part (2) has at least one storage space (39) for accommodating a storage (18).